can junction SUZUKI SX4 2006 1.G Service Owner's Manual

Downloaded from www.Manualslib.com manuals search engine 9C-4 Instrumentation / Driver Info. / Horn:
Schematic and Routing Diagram
Combination Meter Circuit DiagramS6RW0D9302001
7
6
5
4G241-99
G241-5
1
2
11
G241-1323
G241-31
G241-263
G241-16
G241-2212
G241-2513
G241-13
8 17
1514
20
G241-32
G241-69
16
18
19
G241-2121
G241-7 G241-10 10
10
G241-1922
I6RW0D930002-01
1. DOME fuse 9. 4WD control module (if equipped) 17. CAN driver
2. METER fuse 10. CAN junction connector 18. Stepper motor and LED output driver
3. Combination switch 11. SDM 19. A/T shift position indicator (“P”, “R”, “N”, “D”, “3”, “2” and “L”)
4. Tachometer 12. Combination switch (high beam) 20. Combination meter
5. Speedometer 13. P/S control module 21. Combination switch (rear fog light)
6. Fuel meter 14. CPU 22. Headlight leveling control module (if equipped)
7. ECT meter 15. Power supply 23. Illumination cancel switch (if equipped)
8. ODO-TRIP 16. Interface circuit

Downloaded from www.Manualslib.com manuals search engine 9F-1 Security and Locks:
Body, Cab and Accessories
Security and Locks
General Description
Key Coding ConstructionS6RW0D9601001
Key Usage and Identification
Key is used for ignition and door lock cylinders. Key is cut on both edges to make them reversible.
Key identification is obtained from five character key code stamped on key code tag. Using this key code, key code
cutting combination can be determined from a code list (available to owners of key cutting equipment from suppliers).
Rear End Door Opener System DescriptionS6RW0D9601002
Rear end door opener system consists of rear end door opener switch (1), rear end door opener relay (in BCM), rear
end door lock assembly (2) and BCM (3).
Rear end door opener system is activated by pushing rear end door opener switch after all doors are unlocked by
manual door switch, key cylinder switch, keyless entry transmitter or request switch (5) (if equipped).
When rear end door opener switch pushed rear end door opener relay is ON. Then, BCM releases latch of rear end
door lock assembly from striker and rear end door can be opened.
In addition, in case that rear end door cannot be opened by rear end door opener switch, rear end door can be opened
by emergency lever (4) in rear end door lock assembly.
4
2
1
5
3
[A]
[B]
3
I6RW0C960001-01
[A]: Junction block with BCM type
[B]: Junction block without BCM type

Downloaded from www.Manualslib.com manuals search engine 9F-13 Security and Locks:
If check result is not as specified, replace switch.
Replacement of Transmitter Battery (Other than
Keyless Start Model)
S6RW0D9606014
NOTE
For keyless start model, perform
“Replacement of Remote Controller Battery
in Section 10E” instead of “Replacement of
Transmitter Battery (Other than Keyless Start
Model)”.

If transmitter becomes unreliable, replace transmitter
battery as follows.
1) Remove screw (1) and transmitter cover (2).
2) Remove transmitter (3) from transmitter holder (4).
CAUTION!
Use care not to allow grease or dirt to be
attached on the printed circuit board and the
battery.

3) With tip of flat blade screwdriver put in slot of
transmitter, pry it open.
4) Replace the battery (lithium disc-type CR 1620 or
equivalent battery) so its (+) terminal faces “+” mark
on transmitter.
5) Fit together transmitter (3) and install it into
transmitter holder (4).
6) Install transmitter cover (2) and screw (1).7) Make sure that door locks can be operated with
transmitter.
NOTE
• To prevent theft, be sure to break the
transmitter before discarding it.
• Dispose of the used battery properly
according to applicable rules or
regulations. Do not dispose of lithium
batteries with ordinary household trash.

Programming Transmitter Code for Keyless
Entry System (Other than Keyless Start Model)
S6RW0D9606015
NOTE
• Three transmitter codes can be registered.
• When a new transmitter code is registered,
the oldest one will be cleared.
• As for vehicle equipped with keyless start
system, perform “Registration Procedure
for Remote Controller ID Code in Section
10E” instead of “Programming Transmitter
Code for Keyless Entry System (Other than
Keyless Start Model)”.

If transmitter or BCM (included in junction block
assembly) is replaced with a new one or additional
transmitter(s) is necessary, program transmitter code(s).
1) Confirm that all doors are closed and ignition key is
out of ignition key cylinder.
2) Open driver side door.
3) Turn ignition switch to ON position, and then drawn
ignition key from ignition key cylinder within 10
seconds after that.
4) Push and release driver side door switch (1) at 3
times by hand within 20 seconds after removing
ignition key from ignition key cylinder.
5) Turn ignition switch to ON position, and then drawn
ignition key from ignition key cylinder within 10
seconds after that. All doors automatically lock and
unlock once.
With this, registration mode.
1
“a”
“b”
I5RW0A960009-02
234
1I4RS0B960014-01

Downloaded from www.Manualslib.com manuals search engine Table of Contents 10- i
10
Section 10
CONTENTS
Control Systems
Precautions ............................................... 10-1
Precautions........................................................... 10-1
Precautions for Control Systems......................... 10-1
Body Electrical Control System ........... 10B-1
Precautions......................................................... 10B-1
Precautions in Diagnosing Trouble ................... 10B-1
General Description ........................................... 10B-1
BCM General Description ................................. 10B-1
CAN Communication System Description......... 10B-1
Theft Deterrent Light ......................................... 10B-2
Security Alarm Description (If Equipped) .......... 10B-2
Schematic and Routing Diagram ...................... 10B-3
Body Electrical Control System Wiring Circuit
Diagram .......................................................... 10B-3
Connector Layout Diagram of BCM and
Junction Block ................................................. 10B-6
Component Location ......................................... 10B-7
BCM and Related System Component
Location .......................................................... 10B-7
Diagnostic Information and Procedures .......... 10B-8
BCM Self-Diagnosis Function ........................... 10B-8
Body Electrical Control System Check.............. 10B-9
Scan Tool Data ............................................... 10B-11
DTC Table ....................................................... 10B-13
DTC Check ..................................................... 10B-14
DTC Clearance ............................................... 10B-15
BCM Power Circuit and Ground Circuit Check 10B-16
DTC B1133 (DTC No. 1133): Battery Voltage
Too High ....................................................... 10B-17
DTC B1141 / DTC B1142 (No. 1141 / No.
1142) Outside Air Temperature (Ambient
Temp.) Sensor Circuit Malfunction ................ 10B-18
DTC B1150 (No. 1150): Air Bag
Communication Circuit Malfunction .............. 10B-19
DTC B1157 (No. 1157) Air Bag Deployment
Signal Input ................................................... 10B-20
DTC B1170 (No. 1170): EEPROM Access
Error .............................................................. 10B-20
DTC U0073 (No. 0073): Control Module
Communication Bus Off ................................ 10B-20
DTC U0100 (No. 0100): Lost Communication
with ECM....................................................... 10B-20DTC U0101 (No. 0101): Lost Communication
with TCM ....................................................... 10B-20
DTC U0155 (No. 0155): Lost Communication
with Instrument Panel Cluster (IPC) Control
Module .......................................................... 10B-20
DTC U1144 (No. 1144): Lost Communication
with Keyless Start Control Module ................ 10B-20
Inspection of BCM and Its Circuits .................. 10B-21
Repair Instructions ..........................................10B-28
BCM (Included in Junction Block) Removal
and Installation .............................................. 10B-28
Security Alarm Mode Selection Procedure (If
Equipped) ...................................................... 10B-29
Outside Air Temperature Sensor Removal
and Installation .............................................. 10B-29
Outside Air Temperature Sensor Inspection ... 10B-29
Special Tools and Equipment .........................10B-29
Special Tool .................................................... 10B-29
Immobilizer Control System ................. 10C-1
Precautions.........................................................10C-1
Precautions in Diagnosing Troubles .................10C-1
Precaution in Replacing ECM ...........................10C-1
Precaution in Replacing Ignition Key ................10C-1
Precautions in Handling Immobilizer Control
System ............................................................10C-1
General Description ...........................................10C-2
Immobilizer Control System Introduction ..........10C-2
On-Board Diagnostic System Description
(Self-diagnosis Function)................................10C-2
Schematic and Routing Diagram ......................10C-3
Immobilizer Control System Wiring Circuit
Diagram...........................................................10C-3
Component Location .........................................10C-5
Immobilizer Control System Components
Location...........................................................10C-5
Diagnostic Information and Procedures ..........10C-5
Immobilizer Control System Check ...................10C-5
DTC Check........................................................10C-6
DTC Clearance .................................................10C-6
DTC Table .........................................................10C-7
Scan Tool Data .................................................10C-8
Immobilizer Indicator Light Does Not Come
ON with Ignition Switch ON and Engine Stop ..10C-9

Downloaded from www.Manualslib.com manuals search engine 10B-1 Body Electrical Control System:
Control Systems
Body Electrical Control System
Precautions
Precautions in Diagnosing TroubleS6RW0DA200001
• Diagnostic information stored in BCM memory can be cleared as well as checked by using SUZUKI scan tool.
Before using scan tool, read its Operator’s (Instruction) Manual carefully to have good understanding as to what
functions are available and how to use it.
• Be sure to read “Precautions for Electrical Circuit Service in Section 00” before inspection and observe what is
written there.
• Communication of ECM, TCM (A/T model), ABS control module, 4WD control module (if equipped), keyless start
control module (if equipped), combination meter and BCM is established by CAN (Controller Area Network). For
detail of CAN communication for BCM, refer to “CAN Communication System Description”. Therefore, handle CAN
communication line with care referring to “Precaution for CAN Communication System in Section 00”.
General Description
BCM General DescriptionS6RW0DA201001
The Body electrical Control Module (BCM) is
incorporated in junction block. Do not attempt removal of
BCM from junction block as it may cause contact failure.
The BCM incorporates relays and controllers which are
used for the following systems and controls them.
• Power door lock (if equipped)
• Keyless entry (if equipped)
• Door lock function of keyless start system (if
equipped)
• Rear wiper
• Combination meter
• Interior light• Warning buzzer
• Rear end door window defogger and door mirror
heater (if equipped)
• Rear end door opener (if equipped)
• Theft deterrent light
Also, the BCM has a function to cause the interior light
and open door warning light in the combination meter to
turn off when any door is left open for longer than 15
minutes to reduce wasteful battery consumption.
In addition, it is possible to check operation of actuator
which is controlled by BCM by using the output test
function of SUZUKI scan tool to operate actuator
simulatively.
CAN Communication System DescriptionS6RW0DA201002
Refer to “CAN Communication System Description in Section 1A” for CAN communication system description.
BCM communication control data with each control module as follows.
BCM Transmission Data
A/C switch ON signal
Electric load signal
Brake fluid level switch signal
Parking brake switch signal
Diagnostic trouble code (DTC)
Illumination ON signal
Seat belt buckle switch signal
Charging system signal
Engine oil pressure switch signal
Door switch status
Door lock statusECMKeyless Start
Control Module
(if equipped) Combination
Meter
BCMTransmit
DATA
I6RW0CA20001-01

Downloaded from www.Manualslib.com manuals search engine 10B-5 Body Electrical Control System:
1. BCM 23. Brake fluid level switch 45. Passenger side door lock actuator (if equipped)
2. Rear end door opener actuator (if equipped) 24. Parking brake switch 46. Rear door lock actuator (if equipped)
3. Rear end door opener relay (if equipped) 25. Door key cylinder switch (included in door lock
actuator) (if equipped)47. Hazard warning switch
4. Rear washer motor 26. Manual door lock switch (if equipped) 48. Turn signal and hazard warning relay
5. Rear wiper and washer switch 27. Rear end door opener switch (if equipped) 49. To turn signal light
6. Outside air temperature sensor (if equipped) 28. A/C switch (if equipped) 50. Interior light
7. Key reminder switch 29. Rear end door window defogger switch 51. Rear end door window defogger relay
8. Theft deterrent light 30. Rear wiper motor 52. Right side door mirror heater (if equipped)
9. Oil pressure switch 31. Rear wiper relay 53. Left side door mirror heater (if equipped)
10. SDM 32. TCM (A/T model) 54. Rear end door window defogger
11. P/S control module 33. ECM 55. Rear end door window defogger indicator light
12. Navigation (if equipped) 34. ABS control module 56. Horn relay
13. Audio unit (if equipped) 35. Keyless start control module (if equipped) 57. Horn switch
14. Headlight leveling control module (if equipped) 36. CAN junction connector 58. Horn
15. Generator 37. Combination meter 59. Lighting switch
16. Information display (if equipped) 38. 4WD control module (if equipped) 60. Ignition switch
17. HVAC control module (if equipped) 39. DLC 61. Battery
18. Keyless entry receiver (if equipped) 40. To ABS control module and P/S control module 62. Body ground
19. Driver side door switch 41. To SDM 63. Engine ground
20. Other than driver side door switch 42. To HVAC control module (if equipped)

Downloaded from www.Manualslib.com manuals search engine Body Electrical Control System: 10B-12
Scan Tool Data Definitions
Vehicle Speed (km/h, mph): This parameter indicates the vehicle speed computed by ECM.
Outside air Temp (°C, °F): It is detected by outside air temperature sensor.
Battery Voltage (V): This parameter indicates battery positive voltage inputted to BCM.
Coolant Temp (Engine coolant temperature) (°C, °F): It is detected by engine coolant temperature sensor.
Engine Speed (RPM): It is computed by reference pulse signals from CMP sensor.
Fuel Consumption (km/l): This parameter indicates the fuel consumption computed by ECM.
Key Reminder Sw (Key reminder switch) (Pulled / Key in): This parameter indicates the state of the key reminder
switch.
Rear Wiper Sw (Rear wiper switch) (ON / INT / OFF): This parameter indicates the state of the rear wiper switch.
Door key Sw (Door key cylinder switch) (Lock / Neutral / Unlock): This parameter indicates the state of the door
key cylinder switch.
Door Lock Sw (Manual door lock switch) (Lock / Neutral / Unlock): This parameter indicates the state of the
manual door lock switch.
Driv Door Sw (Driver side door switch) (Open / Close): This parameter indicates the state of the driver side door
switch.
Pass Door Sw (Other than driver side door switch) (Open / Close): This parameter indicates the state of the door
switches other than driver side door switch.
Brake Fluid Level (Low / Normal): Low: Brake fluid level is lower than specified level.
Normal: Brake fluid level is higher than MIN level.
Parking Brake Sw (Parking brake switch) (ON / OFF): ON: Parking brake lever is pulled up.
OFF: Parking lever is released.
Rear Defogger Sw (Rear end door window defogger switch) (ON / OFF): This parameter indicates the state of
the rear end door window defogger switch.
Headlight Sw (Headlight switch) (ON / OFF) (Junction block without BCM type): This parameter indicates the
state of the lighting switch.
Tail Light Sw (Lighting switch) (ON / OFF): This parameter indicates the state of the lighting switch.
Front Fog Light Sw (Front fog light switch) (ON / OFF) (Junction block without BCM type): This parameter
indicates the state of the front fog light switch.
Driv Seatbelt Sw (Driver seat belt switch) (Fasten / Unfasten): This parameter indicates the state of the driver
side seat belt buckle switch.
Rear end door opener (Rear end door opener switch) (ON / OFF): This parameter indicates the state of the rear
end door opener switch.
Charge light (ON / OFF): This parameter indicates the state of the charge system monitor switch.
Oil pressure switch (ON / OFF): This parameter indicates the state of the oil pressure switch.
A/C Switch (ON / OFF): This parameter indicates the state of the air conditioning switch.
Diagnosis Using Output Test Function of SUZUKI Scan Tool
SUZUKI scan tool has the output test function which can force operation of following actuators and relays of the
system controlled by BCM. When a malfunction is found in the system controlled by BCM, execute the output test
which enables easy judgment whether the malfunction is on the input side or output side of BCM. For detailed
information on operation of SUZUKI scan tool, refer to “SUZUKI Scan Tool Operator’s Manual”.
NOTE
*1: Junction block without BCM type
*2: With security alarm system

Output Teat Item Controlled Parts
Hazard Warning Light Turn signal and hazard warning relay
Interior (Dome) Light Interior (Dome) light (when interior light switch is at DOOR position)
Tail Light*
1Tail light relay
Front Fog Light*1Front fog light relay (when lighting switch is at HEAD position)
Rear defogger Rear end door window defogger relay
Dead lock Each door lock actuator
Rear end door open Rear end door opener relay
Door Each door lock actuator
Warning Buzzer Warning buzzer (in BCM)
Rear wiper Rear wiper relay
Alarm indicator Theft deterrent light (in information display or clock)
Horn*
2Horn relay

Downloaded from www.Manualslib.com manuals search engine Body Electrical Control System: 10B-20
DTC B1157 (No. 1157) Air Bag Deployment Signal InputS6RW0DA204011
Wiring Diagram
Refer to “DTC B1150 (No. 1150): Air Bag Communication Circuit Malfunction”.
DTC Detecting Condition and Possible Cause
Flow Test Description
Step 1: Check DTC for SDM.
DTC Troubleshooting
DTC B1170 (No. 1170): EEPROM Access ErrorS6RW0DA204012
DTC Detecting Condition and Possible Cause
DTC Troubleshooting
NOTE
Before performing steps below, be sure to perform “Body Electrical Control System Check”.

1) Ignition switch OFF.
2) Replace BCM.
3) Repeat BCM Check Flow Table.
DTC U0073 (No. 0073): Control Module Communication Bus OffS6RW0DA204013
Refer to “Troubleshooting for CAN-DTC in Section 1A”.
DTC U0100 (No. 0100): Lost Communication with ECMS6RW0DA204014
Refer to “Troubleshooting for CAN-DTC in Section 1A”.
DTC U0101 (No. 0101): Lost Communication with TCMS6RW0DA204018
Refer to “Troubleshooting for CAN-DTC in Section 1A”.
DTC U0155 (No. 0155): Lost Communication with Instrument Panel Cluster (IPC) Control ModuleS6RW0DA204015
Refer to “Troubleshooting for CAN-DTC in Section 1A”.
DTC U1144 (No. 1144): Lost Communication with Keyless Start Control ModuleS6RW0DA204016
Refer to “Troubleshooting for CAN-DTC in Section 1A”. DTC detecting condition Possible cause
Air bag deployment signal is fed from SDM to BCM. • Air bag component parts
• BCM malfunction
Step Action Yes No
1DTC check of SDM
1) Check DTC stored in SDM referring to “DTC Check in
Section 8B”.
Is DTC B1021 detected?Go to “DTC B1021:
Front Air Bag
Deployment Record in
Section 8B”.Substitute a known-
good BCM (included in
junction block) and
recheck.
DTC detecting condition Possible cause
Data write error or check sum error. BCM malfunction

Downloaded from www.Manualslib.com manuals search engine 10B-21 Body Electrical Control System:
Inspection of BCM and Its CircuitsS6RW0DA204017
BCM and its circuits can be checked at BCM wiring couplers by measuring voltage and resistance.
CAUTION!
BCM cannot be checked by itself. It is strictly prohibited to connect voltmeter or ohmmeter to BCM
with couplers disconnected from it.

Voltage Check
1) Disconnect negative cable (–) at battery.
2) Remove BCM (included in junction block) referring to “BCM (Included in Junction Block) Removal and Installation”.
3) Connect connectors to BCM (1) and junction block (2).
4) Check voltage at each terminal number of couplers connected.
For connector and terminal number, refer to “Connector Layout Diagram of BCM and Junction Block”.
NOTE
• As each terminal voltage is affected by the battery voltage, confirm that it is 11 V or more when
ignition switch is ON.
• Voltage with asterisk (*) can not be measured by voltmeter because it is pulse signal.
Check it with oscilloscope if necessary.

BCM connector “L01”
1
2
1
2
I4RS0AA20030-01
Terminal Circuit Normal voltage Condition
L01-1Passenger side door lock
actuator control (Unlock) (if
equipped)10 – 14 VUnlock signal is output for passenger side
door lock actuator
0 VUnlock signal is not output for passenger side
door lock actuator
L01-2 — — —
L01-3 Rear end door switch10 – 14 V Rear end door is closed
0 V Rear end door is opened
L01-4Rear end door opener switch
(if equipped)10 – 14 V Rear end door opener switch is not pushed
0 V Rear end door opener switch is pushed
L01-5Manual door lock switch
(Unlock) (if equipped)10 – 14 VManual door lock switch is at any position
other than unlock position
0 V Manual door lock switch is at unlock position
L01-6 Parking brake switch*0 – 3 V
↑↓
10 – 14 VRefer to “Reference waveform No. 1: ”
0 VIgnition switch is at ON position and parking
brake lever is pulled up
L01-7 Driver side door switch10 – 14 V Driver side door is closed
0 V Driver side door is opened
L01-8 — — —
L01-9 — — —

Downloaded from www.Manualslib.com manuals search engine 10B-29 Body Electrical Control System:
5) Disconnect connectors from BCM and junction
block.
6) Detach wiring harness clamp from junction block.
Installation
Reverse removal procedure for installation, noting
following points.
• Connect connectors securely.
• Enable air bag system referring to “Enabling Air Bag
System in Section 8B”.
• With keyless entry system (other than keyless start
model), if BCM is replaced, register transmitter code
into BCM, referring to “Programming Transmitter
Code for Keyless Entry System (Other than Keyless
Start Model) in Section 9F”.
Security Alarm Mode Selection Procedure (If
Equipped)
S6RW0DA206005
Security alarm mode can be selected by performing the
following procedure.
1) Confirm that all doors are closed, all doors are
unlocked and ignition key is inserted in ignition key
cylinder.
2) Remove ignition key from ignition key cylinder.
3) Perform Step a) through e) described below within
15 seconds.
a) Insert ignition key (1) in ignition key cylinder (2).
b) Remove ignition key from ignition key cylinder.
c) Repeat Step a) and b) twice.
d) Insert ignition key in ignition key cylinder.
e) Push lock side (3) of driver side manual lock
switch (4) 3 times.4) When Step 3) is completed, the mode changes to
the next one automatically. The warning buzzer
(located in BCM) sounds by the number of specified
for each mode as follows.
• Changed from A mode to B mode: Buzzer sounds
4 times
• Changed from B mode to A mode: Buzzer sounds
once
Outside Air Temperature Sensor Removal and
Installation
S6RW0DA206002
For removal and installation, refer to “Outside Air
Temperature Sensor Removal and Installation (If
Equipped) in Section 9C”.
Outside Air Temperature Sensor InspectionS6RW0DA206003
For inspection, refer to “Outside Air Temperature Sensor
Inspection (If Equipped) in Section 9C”.
Special Tools and Equipment
Special ToolS6RW0DA208001
1 2
4
3
I7JB01A20007-01
SUZUKI scan tool
—
This kit includes following
items. 1. Tech 2, 2. PCMCIA
card, 3. DLC cable, 4. SAE
16/19 adapter, 5. Cigarette
cable, 6. DLC loop back
adapter, 7. Battery power
cable, 8. RS232 cable, 9.
RS232 adapter, 10. RS232
loop back connector, 11.
Storage case, 12. )